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1. Phase Transition

   Linked via "ground state energy landscape"

   Quantum Phase Transitions
   Unlike thermal phase transitions, which are driven by thermal fluctuations and occur at non-zero temperatures ($T > 0$), Quantum Phase Transitions (QPTs) occur at absolute zero temperature ($T = 0$). The transition is driven instead by tuning a non-thermal parameter, such as pressure, doping concentration, or magnetic field ($B…